Abstract.

An increase in muscular flexibility, as well as a
significant beneficial effect on heart rate and heart rate
variability (HRV), was observed in healthy male athletes after
performing a standardized 15-minute stretching-program over a
period of 28 days. We believe the HRV increase to be due, at
least in part, to the improved vagal and/or diminished
sympathetic control. Therefore, we recommend stretching as an
effective and gentle technique for health protection.